My uncle recently offered me the privellege of being deck hand on his 63 foot Jetboat "Double Trouble". 
The trip was to deliver the boat from Hobart to Gold Coast.   Unfortunately, time was not on my side so I was only able to make the Hobart to Sydney leg. 
What an experience!
This is something that I will never forget and it has given me stories that will last a lifetime.
Check out the photos at http://georgesons.net/image/tid/3